President Xi Jinping sent his former chief of staff, Li Zhanshu, the highest-ranking Chinese official to visit Pyongyang in nine years, who was seen waving hands next to Kim.
Diplomatic invitations for the anniversary have gone out around the world, but the only head of state known to be attending is Mauritanian president Mohamed Ould Abdel Aziz.
This comes after North Korea's parade highlighted economic development instead of its traditional show of military force.
Sunday's parade also emphasized the country's economy in addition to showcasing its military capabilities. Trump tweeted. "There is nothing like good dialogue from two people that like each other!"
Kim's effort to ease tensions with President Donald Trump has stalled since their June summit in Singapore.
Washington wants Pyongyang to move decisively toward dismantling its nuclear weapons program, but North Korea insists it first wants a declaration that the 1950-53 Korean War is over, as a way of helping guarantee its security and build trust.
Last year, North Korea displayed its long-range missiles for the world to see, unnerving the White House and prompting a fiery exchange of insults from both sides, leaving many fearing war.
This year's parade wasn't televised but the state media apparatus filmed it - even using drones with cameras.
We were in the massive square named after Kim's grandfather, the country's founding leader.
Sunday's parade came just days after a high-level South Korean delegation had returned from a meeting with Kim in Pyongyang.
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There was no sign of the Hwasong-14 and -15 missiles that can reach the mainland US and changed the strategic balance when they were first tested previous year.
Russian Federation and China both have land borders with North Korea and were its allies in the Korean conflict in the early 1950s.
The North Korean leader presided at the parade but did not deliver a speech there and authorities opted not to display any intercontinental or medium-range ballistic missiles among the military hardware in the procession. "So I think it will be well received".
At a concert on Saturday evening that kicked off the celebrations, the imagery on display focused heavily on the economy, with only a few short military segments, none of them showing missiles. "They ended with these huge rockets coming down the street". "North Korea has the economic problems and there are people unhappy with that".
"It's favorable to both of them, but especially to North Korea", said Choo Jaewoo, a professor of Chinese foreign policy at Kyung Hee University.
Kim Jong Un and his South Korean counterpart Moon will meet in Pyongyang on September 18-20 for the third time this year and discuss "practical measures" towards denuclearisation, officials in Seoul have said.
Xi said that he and Kim had reached important consensus during their three meetings this year, opening a new chapter in the development of China-DPRK relations. He claims to have perfected his nuclear arsenal enough to deter US aggression and devote his resources to raising his nation's standard of living.
North Korea's alleged new missile would also be able to launch satellites into space - something Kim last did back in February 2016.
This year's celebration also marks a return of North Korea's Mass Games, which involve tens of thousands of people dancing in unison in a display of national unity.
The mass games performances are expected to continue for the next month or so, with tickets for foreigners starting at just over $100 and going up to more than $800 per seat.